কোনো পরীক্ষায় পরীক্ষার্থীরা 80% গণিত এবং 70% বাংলায় পাশ করলো। উভয় বিষয়ে পাশ করলো 60%, উভয় বিষয়ে শতকরা কতজন ফেল করলো?
A. 10%
B. 15%
C. 11%
D. 12%
সঠিক উত্তরঃ
A.
10%
Explanation:
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